[llvm] [MC] Optimize loops in MC. (PR #98114)

[Dmitriy Chestnykh via llvm-commits]

chestnykh wrote:

> Can't some/all of these be range based for loops instead?

Is range based loop preferable?

> Can't some/all of these be range based for loops instead?

I left comments where the loop can be transformed into range-based. Other loops use iterator in their body so i think we can leave them without changes.

https://github.com/llvm/llvm-project/pull/98114